What volume of 0.1 M NaOH solution is required to neutralise 100 … - Vidyadip

Question

What volume of 0.1 M NaOH solution is required to neutralise 100 ml of concentrated aqueous sulphuric acid which contains $98 \% \mathrm{~H}_2 \mathrm{SO}_4$ by mass. The density of concentrated sulphuric acid solution is $1.84 \mathrm{g} \mathrm{ml}^{-1} \mathrm{NaOH}$ reacts with $\mathrm{H}_2 \mathrm{SO}_4$ according to the following reaction:
$2 \mathrm{NaOH}+\mathrm{H}_2 \mathrm{SO} 4 \rightarrow \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{H}_2 \mathrm{O}$
(Atomic mass $/ \mathrm{g} \mathrm{mol}^{-1} \mathrm{H}=1, \mathrm{~S}=32, \mathrm{O}=16$ ).

✓

Answer

Molarity $=\frac{\text{Number of moles of solute}}{\text{Litre of solution}}$

$=\frac{\text{Mass of solute}\big(\text{W}_{\text{B}}\big)}{\text{Molar mass of solute}\big(\text{M}_{\text{B}}\big)}\times\frac{1000}{\text{Volume of solution in mL}}$

$=\frac{\text{Mass of solute}\big(\text{W}_{\text{B}}\big)}{\text{Molar mass of solute}\big(\text{M}_{\text{B}}\big)}\times\frac{1000}{\frac{\text{Volume of solution}}{\text{Density of solution}}}$

$=\frac{98}{98}\times\frac{1000}{\frac{\text{Volume of solution}}{\text{Density of solution}}}$

$=\frac{98}{98}\times\frac{1000}{\frac{100}{1.84}}=18.4\text{M}$

$=\frac{98}{98}\times\frac{1000}{100}\times1.84$

$2(\text{M}_1\text{V}_1)_{\text{H}_2\text{SO}_4}=(\text{M}_2\text{V}_2)_{\text{NaOH}}$

$\Rightarrow2\times18.4\text{M}\times100\text{ml}=0.1\text{M}\times\text{V}_2$

$\Rightarrow\text{V}_2=\frac{2\times18.4\times100}{0.1}$

$=36.80\times10^3\text{ml}=36.8\text{L}.$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "5 Marks Questions" from Some Basic Concepts of Chemistry→Some Basic Concepts of Chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Derive the Rydberg formula.

Balance the following ionic equations. $\text{Cr}_2\text{O}^{2-}_7+\text{Fe}^{2+}+\text{H}^+\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Cr}^{3+}+\text{Fe}^{3+}+\text{H}_2\text{O}$

Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse source is $2.5 \times 10^{15}$, calculate the energy of the source.

$K _1$ and $K _2$ for dissociation of $H _2 S$ are $4 \times 10^{-3}$ and $1 \times 10^{-5}$. Calculate sulphide ion concentration in $0.1 M H _2 S$ solution.

Derive the formula required to find the energy of the electron in Bohr orbital.

Explain the formation of $H_2$ molecule on the basis of valence bond theory.

Write a relation between $\triangle G$ and Q and define the meaning of each term and answer the following:
a. Why a reaction proceeds forward when $Q < K$ and no net reaction occurs when $Q = K$.
b. Explain the effect of an increase in pressure in terms of reaction quotient Q for the reaction:
$
CO(g)+3 H_2(g) \rightleftharpoons CH_4(g)+H_2 O(g)
$

The effect of uncertainty principle is significant only for motion of microscopic particles and is negligible for the macroscopic particles. Justify the statement with the help of a suitable example.

Define the following:
(i) Isothermal process (ii) Enclosed thermal process (iii) Isobaric process (iv) Isovolumetric process

What is photoelectric effect? State the result of photoelectric effect experiment that could not be explained on the basis of laws of classical physics. Explain this effect on the basis of quantum theory of electromagnetic radiations.